Facile one pot preparation of magnetic chitosan-palygorskite nanocomposite for efficient removal of lead from water
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Title |
Facile one pot preparation of magnetic chitosan-palygorskite nanocomposite for efficient removal of lead from water
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Creator |
Raj Mukhopadhyay
Binoy Sarkar Takuya Tsuzuki Ruhaida Rusmin Yanju Liu Ravi naidu |
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Subject |
Adsorbent regeneration,Chitosan,Lead removal,Magnetic nanocomposite,Palygorskite,Wastewater treatment
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Description |
Not Available
Development of polymeric magnetic adsorbents is a promising approach to obtain efficient treatment of contaminated water. However, the synthesis of magnetic composites involving multiple components frequently involves tedious preparation steps. In the present study, a magnetic chitosan-palygorskite (MCP) nanocomposite was prepared through a straight-forward one pot synthesis approach to evaluate its lead (Pb2+) removal capacity from aqueous solution. The nano-architectural and physicochemical properties of the newly-developed MCP composite were described via micro- and nano-morphological analyses, and crystallinity, surface porosity and magnetic susceptibility measurements. The MCP nanocomposite was capable to remove up to 58.5 mg Pb2+ g-1 of MCP from water with a good agreement of experimental data to the Langmuir isotherm model (R2 = 0.98). The Pb2+ adsorption process on MCP was a multistep diffusion-controlled phenomenon evidenced by the well-fitting of kinetic adsorption data to the intra-particle diffusion model (R2 = 0.96). Thermodynamic analysis suggested that the adsorption process at low Pb2+ concentration was controlled by chemisorption, whereas that at high Pb2+ concentration was dominated by physical adsorption. X-ray photoelectron and Fourier transform infrared spectroscopy results suggested that the Pb adsorption on MCP was governed by surface complexation and chemical reduction mechanisms. During regeneration, the MCP retained 82% Pb2+ adsorption capacity following four adsorption-desorption cycles with ease to recover the adsorbent using its strong magnetic property. These findings highlight the enhanced structural properties of the easily-prepared nanocomposite which holds outstanding potential to be used as an inexpensive and green adsorbent for remediating Pb2+ contaminated water. |
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Date |
2021-09-30T11:43:40Z
2021-09-30T11:43:40Z 2021-9-19 |
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Type |
Research Paper
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Identifier |
Not Available
0021-9797 http://krishi.icar.gov.in/jspui/handle/123456789/64835 |
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Language |
English
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Publisher |
Not Available
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